createConnector

Creates an uninitialied connector from the provided MuleEndpointURI. The
scheme is used to determine what kind of connector to create. Any params set
on the uri can be used to initialise bean properties on the created connector.

Note that the initalise method will need to be called on the connector
returned. This is so that developers can control when the connector
initialisation takes place as this is likely to initialse all connecotr
resources.